= Scheduled Messages
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Scheduled messages differ from normal messages in that they won't be delivered until a specified time in the future, at the earliest.

To do this, a special property is set on the message before sending it.

== Scheduled Delivery Property

The property name used to identify a scheduled message is `"_AMQ_SCHED_DELIVERY"` (or the constant `Message.HDR_SCHEDULED_DELIVERY_TIME`).

The specified value must be a positive `long` corresponding to the time the message must be delivered (in milliseconds).
An example of sending a scheduled message using the JMS API is as follows.

[,java]
----
TextMessage message = session.createTextMessage("This is a scheduled message message which will be delivered in 5 sec.");
message.setLongProperty("_AMQ_SCHED_DELIVERY", System.currentTimeMillis() + 5000);
producer.send(message);

...

// message will not be received immediately but 5 seconds later
TextMessage messageReceived = (TextMessage) consumer.receive();
----

Scheduled messages can also be sent using the core API, by setting the same property on the core message before sending.

== Example

See the xref:examples.adoc#scheduled-message[Scheduled Message Example] which shows how scheduled messages can be used with JMS.
